Multiple choice

In high mountain regions bleeding through nose occurs because

  1. the pressure of the blood capillaries is higher than the outside pressure

  2. the pressure at high altitudes is higher than that of the plains

  3. the blood pressure increases increases at high altitudes

  4. the blood pressure fluctuates and cause the blood vessels to break
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

At high altitudes, atmospheric pressure is lower. The internal blood pressure in the capillaries remains higher than the external pressure, which can cause delicate vessels in the nose to rupture.

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